Where is the freeze plug on hiace van?

The location of freeze plugs (also called core plugs) on a Toyota Hiace van varies depending on the year and engine type. There isn't one single location. They're typically found in the engine block itself, sealing off water jacket cavities.

To find them, you'll need to consult a repair manual specific to your Hiace's year and engine. The manual will have diagrams showing the exact locations of all freeze plugs. Searching online for "[your Hiace's year and engine code] freeze plug diagram" should yield helpful results.

Without knowing your specific Hiace model (year and engine), I cannot provide precise locations. Attempting to locate them without a diagram risks damage to your engine.